Operation of storage-batteries in connection with alternating-current systems.



No. 877,018. PATENTED JAN. 21, 1908. J. H. TRACY.

OPERATION OF STORAGE BATTERIES IN CONNECTION WITH ALTERNATING CURRENTSYSTEMS.

' APPLICATION FILED mm: 21 1907.

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J. H, TRACY.

OPERATION OF STORAGE BATTBRIESIN CONNECTION WITH ALTERNATING CURRENTSYSTEMS.

A P 10 T 0N FIL D JUN 21 1907.

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flllhlilnected by a conductor 17, to one nection with an alternatingcurrcn .be required, for batte 56 21 8.11

PATENT clarion.

JOSEPH H. TRACY, OF PHILADELPHIA, PENNSYLVANIA.

OPERATION OF STQRAGE'BATTERIES' IN COhTNECIION WITH ALTERNATING-CURRENTSYSTEMS.

No. 877,018. Specification of Letters Patent. Patented Jan. 21, 1908.-

Applieatiozifiledlilune21,1907- Serial rasaaooa' To all whom it mayconcern.

e it known that I, Josnrn II. TRAoY, a citizen of the United States, andresident of Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented I certain new and useful Improvements in theOperation of Storage Batteries'in Connection with Alternating-CurrentSystems, ol which the following is a specification.

When operating a storage battery in conl system through a rotary and.booster the regulation is not always satisfactory by reason of faultylocation and excitation of the lield ol' the rotary. J

The object ol 'the present invention is to obviate such defcts anddisadvantages and l to provide for the proper excitation of the field ofthe rotary.

In the accompanying drawings, Figure 1, is a diagrammatic view of acircuit embodying features of the invention, and Figs. 2, and .3, aresimilar views illustrating'motlitications. I

In the drawings 1, is an alternating current generator having a workcircuit 23.

4, is'a rotary converter.

5, is a storage battery and 6, is a regulator of the type described inLetters Patent No. 657,722. I

7, is a properly driven booster for the storage battery.

Referring to Fig. 1, the lield 8 for the rotary is included ina circuit9-10, excited by means of an exciter 11-, which also excites the field12 of the generator 1. The fluctuations in the alternating current lineinfluence's the core 13 connected with the pivotal arm 14, having aspring 15, and adapted to. ress upon one or the other of a pi e of caron 16. The middle of the battery is con end-of both piles of carbons andthe-other ends of the piles of carbon are'connected by means ofconductors 18 and 19, across the battery 5. The field 20, of the boosteris interposed in l the conductor 17 and as the arm 14, under theinfluence of fluctations, presses upon one or the other of the iles ofcarbon, current in proper amount and direction is sent through the-field20, so as to cause the booster to make the battery charge or discharge,as may effecting regulation. "he is connected by means of conductors 22,with the direct current end of the rotary 4;. Hitherto rotaries hadtheir field Iexcitation arranged across the conductors 21 and '22, andthe result of locating the field at this position is that when a heavyload comes on the alternating current system it operates the regulatorand helps the booster to build up; the eli'ect of this is that I thevoltage at the lield when so located is raised and the lield of therotary is increased to such an extent that advance currents areimpressed upon the line, which react upon the generator all'ecting itsarmature re-action in such a way as to make its voltage higher. Theresult of a hi her voltage of the generator is to prevent the batteryfrom taking the desired portion of the change in load in the circuit 2,3. scribed arrangement shown'on the drawings, the lield 8, is excited insuch a way that its strength will not be influenced by the change in thevoltage ol the booster. 4

Referring to Fig. 2, the construction and operation is as has beendescribed in connec'- tion with Fig. 1, except that the lield for therotary 4, is a compound lield, one coil 23 is placed in the conductor 21and the other coil 24, is placed in the conductor across the battery,thus this compound lield is not in lluenced by the change in voltage ofthe booster.

Referring to Fig. 3, the construction and arrangement is has beendescribed with the exce )tion the lield 26 for the rotary isindependently excited from a motor driven exciter 27; one end of whichis connected across the line 2 3 and the other end of which is providedwith a circuit 28, containing the field 26. 1

What I claim is,

l. The combination of an alternating current generator and its circuit,a storage battery and its booster and direct current/circuit, a rotaryconverter interposed between the direct current circuit and thealternating current circuit, means responsive to iluctuations in thealternating current circuit and adapted to change the voltage of thebooster, and a field for the rotary converter the strength of which isindependent-of the direct current voltage of the rotary, substantiallyas described. i

- 2. An alternating-current generator and its circuit, a'storage batteryand its complemental booster and circuit, transforming provisionsinterposed between the alternat- However, in the deing current circuifand fluybai'tvpv cin-uit.

In. testimony whereof I have hereunto means responsive to fluctumidm in1110 altvrsignwl my mum.

nating current circuit for varying the voltage of the booster, and :11101! M1" the transforming provisions the strungth of which isindependent of the voltage of the booster, substantially as described.

